{
  "source": "Real server MCP responses from the scenario driver; provider and model identifiers omitted.",
  "before": {
    "isError": false,
    "taskIdReturned": true,
    "childThreadIdReturned": true,
    "childRunIdReturned": true,
    "status": "running",
    "cleanup": "task_cancel called immediately"
  },
  "after": {
    "isError": true,
    "code": "model_unavailable",
    "message": "Requested built-in model is hidden in Provider settings.",
    "taskIdReturned": false,
    "childThreadIdReturned": false
  }
}